GCN Circular 18797
Subject
GRB 160101A: Swift/UVOT Detection
Date
2016-01-01T15:52:34Z (9 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>
M. H. Siegel (PSU) and V. D'Elia (ASDC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began tiled observations of the field of the MAXI-detected
burst GRB 160101A (Itoh et al. GCN Circ. 18793) 13.2 ks after the burst. A
fading optical source consistent with position of the XRT source reported by
Izzo et al. (GCN Circ. 18795) is detected in the initial UVOT exposures in
the u filter.
The preliminary UVOT position is:
RA (J2000) = 14:38:36.12 = 219.65051 (deg.)
Dec (J2000) = -13:48:55.4 = -13.81539 (deg.)
with an estimated uncertainty of 0.58 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT
photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for
the early exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
u 13195 13397 198 17.55+-0.10
u 19592 19652 59 18.32+-0.32
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.09 in the direction of the
burst (Schlegel et al. 1998).